Drying apparatus for web printing presses



Sept. 27, 1938.

DRYING APPARATUS FUR WEB PRINTING PRESSES Filed Aug. 13, 1957 3 FIRST wk was sYLP/m/v 5 8 BELLOWS BLACK FLA 7E8 e0 01 FLA rss w. J. RISLEY, JR 2,131,257

5405 R511 FLA 7E6 PLATES Patented Sept. 27, 1938 UNITED STATES DRYING APPARATUS FOR WEB PRINTING PRESSES- Walter J. Risley, Jr., North Hills, Pa., assignor to The Curtis Publishing Company, Philadelphia, Pa., a corporation of Pennsylvania Application August 13, 1937, Serial No. 158,906

1Claim.

There isa process or method of opposing and in counterflow heat relation because the cooler preventing offset in printing which comprises, printing upon a continuously traveling web with an ink comprising coloring material and a vehicle containing a solvent with a suificiently low vapor pressure to make the ink stable for all press room printing conditions and thereafter increasing the vapor pressure by the application of heat to the web to dry the ink, and cooling the traveling web; and this process is applicable to printing on one or both sides of the web either in one or more colors.

It is one object of the present invention to provide for satisfactorily and properly cooling the web.

Another objectof the invention is to effect a reduction of the consumption of water or other cooling liquid or medium Another object of the invention is to efiect adequate cooling of the web to substantially room temperature and uniformly across its width at all seasons of the year.

Another object of the invention is to satisfactorily cool the web even when baggy or loose end paper rolls are present; that is, rolls on which the web is wound more tightly toward one end than it is toward the other end, so that the contact between the web and the cooling roll is somewhat impaired.

Generally stated, the invention comprises twostage counter-flow cooling with control of flow by means of the temperature of the discharge water.

The invention also comprises the improvements to be presently described and finally claimed.

In the following description, reference will be made to the accompanying drawing, in which the single figure is a diagrammatic and schematic illustration of apparatus embodying features of the present invention.

. Referring to the drawing, I generally indicates the first side printing unit using ink comprising a coloring material, and a vehicle therefor containing a solvent with a sufliciently low vapor pressure to make the ink stable for all press room printing conditions.

second side printing unit. The parts I and 2 are elements of a multi-color press. 3 indicates a heating means and as shown it comprises a steam or other heated cylinder around which the web a from the first unit I passes. In passing around the steam cylinder 3, the volatile solvent is. driven off from the ink and the web is, of

course, highly heated. 4 and 5 are two cooling rolls arranged and piped in series. The heated web passes over' these rolls and is cooled in two stages. Water or other cooling medium is passed through these rolls by the connections 6, I and 8. The web and the rolls 4 and 5 are disposed 2 generally indicates the water or fluid entering the roll 5 encounters the web after it has been cooled at the roll 4 and the heated water or fluid from the roll 5 encounters the web at the roll 4 at a point where the web is comparatively hot. 9 indicates a roll which when present serves to reverse or turn over the web so that the inked side of the web is next to in cooling the web to substantially room temperature at all seasons of the year, because it is economical in the consumption of water or other cooling fluid, and because the web is cooled uniformly across its width even in hot weather, and because baggy end paper rolls give little or no trouble.

In the foregoing description, reference has been made to the application of the invention to printing on both sides of the web in one or more colors, but it is evident that the invention is applicable to printing on one side of the web only and in one or more colors with any appropriate ink.

It will be obvious to those skilled in the art that modifications may be made in details of construction and arrangement without departing from the spirit of the invention which is not limited to matters of mere form and arrangement or otherwise than the prior art and the appended claim may require.

I claim:

For use in web printing presses printing with an ink comprising a coloring material and a vehicle therefor containing a solvent with a sufflciently low vapor pressure to make the ink stable for all press room printing'conditions, the combination of a means for heating the web, two cooling rolls connected in series and around which the heated web passes to cool it in two stages to substantially room temperature, and connections for passing a cooling fluid through the rolls in ,counterflow heat relation to the web and including an inlet valve and means adapted to control the inlet valve and responsive to the temperature of the fluid leaving the rolls which is appropriate for cooling the web to substan tially room temperature.

WALTER. J. RISLEY, Jn'. 

